Synthesis of n-chloroquinolines and n-ethynylquinolines (n=2, 4, 8): homo and heterocoupling reactions
作者:J. Gonzalo Rodríguez、Cristobal de los Rios、Antonio Lafuente
DOI:10.1016/j.tet.2005.07.043
日期:2005.9
the appropriate n-chloroquinoline and 2-methyl-3-butyn-2-ol, catalyzed by palladium, followed by treatment with a catalytic amount of powdered sodium hydroxide in toluene. The n-(ethynyl)quinolines were transformed in the corresponding conjugate 1,4-bis[n′-(quinolyl)]buta-1,3-diynes by oxidative dimerization, catalyzed by cuprous chloride, with excellent yields. Moreover, the heterocoupling between
所述ñ - (乙炔基)喹啉得到令人满意的通过将适当之间heterocoupling反应制备Ñ -chloroquinoline和2-甲基-3-丁炔-2-醇,通过钯催化,随后用氢氧化钠粉末在甲苯中的催化剂量。在氯化亚铜的催化下,通过氧化二聚作用将n-(乙炔基)喹啉转化为相应的共轭1,4-双[ n '-((quinolyl)] buta-1,3-diynes。此外,heterocoupling之间Ñ '-haloquinoline和ñ ' - (乙炔基)喹啉(Ñ由钯催化的',2'或3')分别得到2',2'-双(喹啉)或1,2-二(3'-喹啉基)乙炔。与零价镍配合物相同的偶联反应中,使1,2,4-和1,3,5-三(的混合物Ñ '喹啉基)苯。